How to plot Transient Value for every DC value in DC sweep in Cadence.

Dear Tong011201,

Tong011201 said:

I wonder how I can do that.

One way might be:

1. Define each (settling time and power) as outputs in Explorer or Assembler.

2. Run the set of transient simulations as your vary the DC voltage.

3. Plot each output in two Viva windows (settling time versus DC voltage in one plot and power versus DC voltage in a second plot)

4. Export each waveform from Viva to distinct comma-separated variable files, say settling_time.csv and power.csv

5. Create a new comma-separated variable file whose first column is the second column power.csv and whose second column is the second column of settling_time.csv. This can be done with a UNIX awk command, as an example:

awk 'BEGIN{FS=",";} {print $2}' settling_time.csv > second_column_setting_time.csv

awk 'BEGIN{FS=",";} {print $2}' power.csv > second_column_power.csv

paste -d","  second_column_power.csv second_column_setting_time.csv > settling_time_vs_power.csv

6. Use the function getAsciiWave() to create a waveform from your csv file "settling_time_vs_power.csv"  and plot the waveform; alternately use the SKILL function CCSCreateWaveCSV() at URL:

https://support.cadence.com/apex/ArticleAttachmentPortal?id=a1O0V000009ETw3UAG&pageName=ArticleContent

Shawn

Dear Tong011201,

Tong011201 said:

I wonder how I can do that.

One way might be:

1. Define each (settling time and power) as outputs in Explorer or Assembler.

2. Run the set of transient simulations as your vary the DC voltage.

3. Plot each output in two Viva windows (settling time versus DC voltage in one plot and power versus DC voltage in a second plot)

4. Export each waveform from Viva to distinct comma-separated variable files, say settling_time.csv and power.csv

5. Create a new comma-separated variable file whose first column is the second column power.csv and whose second column is the second column of settling_time.csv. This can be done with a UNIX awk command, as an example:

awk 'BEGIN{FS=",";} {print $2}' settling_time.csv > second_column_setting_time.csv

awk 'BEGIN{FS=",";} {print $2}' power.csv > second_column_power.csv

paste -d","  second_column_power.csv second_column_setting_time.csv > settling_time_vs_power.csv

6. Use the function getAsciiWave() to create a waveform from your csv file "settling_time_vs_power.csv"  and plot the waveform; alternately use the SKILL function CCSCreateWaveCSV() at URL:

https://support.cadence.com/apex/ArticleAttachmentPortal?id=a1O0V000009ETw3UAG&pageName=ArticleContent

Shawn

Dear Tong111201,

A second way, which is easier, is to utilize the relatively new Calculator waveVsWave() function. Its function prototype and an example are at the URL:

support.cadence.com/.../techpubDocViewerPage

and

https://support.cadence.com/apex/ArticleAttachmentPortal?id=a1Od0000005xH8aEAE&pageName=ArticleContent

respectively. In your case, the expression might read:

waveVsWave(?x power,settling_time ?y "Power" ?xName "Power")

Shawn

I cannot access these two links since I am a student using a school's cadence license. Is there any way that I can view these without logging in?

waveVsWave is documented in the help information shipped with Virtuoso (which is essentially what you'd be getting from the first link above; the second is just an example). 

In Virtuoso, in any window, use the Help menu and in the type-in box at the top of the menu type "waveVsWave" and it should take you to relevant help.

Andrew

Got it. Thank you.